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authorume <ume@FreeBSD.org>2005-07-19 06:55:18 +0000
committerume <ume@FreeBSD.org>2005-07-19 06:55:18 +0000
commit866466cabe169eac7c2183255b1a640914759c80 (patch)
tree81572b0298b18f96383436dceb9c05242adc6d96 /share/man/man4/acpi_thermal.4
parenta7fbd037f43b29ea3baf2578ab79f59151b70a6e (diff)
downloadFreeBSD-src-866466cabe169eac7c2183255b1a640914759c80.zip
FreeBSD-src-866466cabe169eac7c2183255b1a640914759c80.tar.gz
Document passive cooling related sysctl MIB.
Diffstat (limited to 'share/man/man4/acpi_thermal.4')
-rw-r--r--share/man/man4/acpi_thermal.47
1 files changed, 7 insertions, 0 deletions
diff --git a/share/man/man4/acpi_thermal.4 b/share/man/man4/acpi_thermal.4
index d4e0aae..c557b8d 100644
--- a/share/man/man4/acpi_thermal.4
+++ b/share/man/man4/acpi_thermal.4
@@ -60,6 +60,12 @@ Current active cooling system state.
If this is non-negative, the appropriate _AC%d object is running.
Set this value to the desired active cooling level to force
the corresponding fan object to the appropriate level.
+.It Va hw.acpi.thermal.tz%d.passive_cooling
+If set to 1, passive cooling is enabled.
+It does cooling without fans using
+.Xr cpufreq 4
+as the mechanism for controlling CPU speed.
+Default is enabled for tz0 where it is available.
.It Va hw.acpi.thermal.tz%d.thermal_flags
Current thermal zone status.
These are bit-masked values.
@@ -122,6 +128,7 @@ stays above _CRT or _HOT for one more poll cycle.
.El
.Sh SEE ALSO
.Xr acpi 4 ,
+.Xr cpufreq 4 ,
.Xr acpidump 8
.Sh AUTHORS
.An -nosplit
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